7220789309885 has 8 divisors (see below), whose sum is σ = 8686555521336. Its totient is φ = 5762225881600.

The previous prime is 7220789309801. The next prime is 7220789309893. The reversal of 7220789309885 is 5889039870227.

It can be written as a sum of positive squares in 4 ways, for example, as 4960655926009 + 2260133383876 = 2227253^2 + 1503374^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7220789309885 - 2¹⁸ = 7220789047741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800693584 + ... + 1800697593.

It is an arithmetic number, because the mean of its divisors is an integer number (1085819440167).

Almost surely, 2^{7220789309885} is an apocalyptic number.

It is an amenable number.

7220789309885 is a deficient number, since it is larger than the sum of its proper divisors (1465766211451).

7220789309885 is a wasteful number, since it uses less digits than its factorization.

7220789309885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601391583.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 7220789309885 in words is "seven trillion, two hundred twenty billion, seven hundred eighty-nine million, three hundred nine thousand, eight hundred eighty-five".